PURPOSE To test wireless resonance circuits (RC) to be used as fiducial marker of endovascular catheters during MR-guided interventions. Current markers loose their signal enhancement for certain catheter orientations. The purpose of this study was to test a marker setup which overcomes this orientation problem. MATERIALS AND METHODS The markers were constructed from a pair of two RCs. The RC...

The aim of this work is to present radar cross section (RCS) measurements of a panel constituted of a flat aluminum plate with and without radar absorbing materials (RAM) type thin rubber sheets, in the range of 8 – 12 GHz. Two different loads were evaluated in the RAM formulation: 1. Magnetic (ferrites MnZn, NiZn and MgZn based), and 2. Dielectric (conducting polymers polyaniline based). The m...

Hereditary retinal degeneration in the Royal College of Surgeons (RCS) strain of rat has been shown to produce extensive loss of photoreceptors and a corresponding decline of the electroretinogram, ganglion cell sensitivity, and the sensitivity of the pupillary light reflex. The behaviorally measured thresholds of RCS rats, on the other hand, are reported to be comparable to those for age-match...

This paper reports a new method for reducing the Radar Cross-Section (RCS) of a metal backed dipole antenna. Numerical simulations are used to show that when the Perfect Electrical Conductor (PEC) is replaced by a carefully designed Frequency Selective Surface (FSS), the electromagnetic performance of the antenna is similar in band, but the RCS of the structure is significantly lower out of ban...

The cell envelope protects bacteria from their surroundings. Defects in its integrity or assembly are sensed by signal transduction systems, allowing cells to rapidly adjust. The Rcs phosphorelay responds to outer membrane (OM)- and peptidoglycan-related stress in enterobacteria. We elucidated how the OM lipoprotein RcsF, the upstream Rcs component, senses envelope stress and activates the sign...

PURPOSE The Royal College of Surgeons (RCS) rat is the most extensively studied animal model for understanding the molecular pathology in inherited retinal degeneration, such as retinitis pigmentosa (RP). The purpose of the present study was to evaluate the pharmacologic effects of several Ca(2+) antagonists on the retinal degeneration of RCS rats. METHODS Several Ca(2+) antagonists, diltiaze...

This article deals with the ability to perform radar cross section (RCS) pattern measurements within reverberation chambers (RCs). The characterization principle is based on estimation of backscattered field from target at a far-field distance and takes advantage diffuse RC. A frequency sweep scattering parameters achieved in presence absence installed rotating mast, retrieved these measurement...

INTRODUCTION: Versican is a large chondroitin sulfate proteoglycan (CSPG). It is one of extracellular proteoglycans that bind to hyaluronan (HA) of which aggrecan, the cartilage-specific proteoglycan is the prototype. Previous studies reported that versican expression is correlated with tumor progression in several types of cancer.(1) Our preliminary study indicated that versican did not expres...

The results of a numerical investigation of the electromagnetic scattering from two-dimensional (2-D) targets on a time-evolving sea surface are presented. The 2-D radar cross section (RCS), or “echo width,” is computed as a function of time as the sea surface evolves linearly using the spectrally accelerated generalized forward-backward method. It is shown that the RCS varies with time on the ...

In order to achieve acceptable pelformance in enhanced DBMS different kinds of parallelism have to be enabled by appropriate implementation capabilities. The Remote Cooperation System (RCS) offers these capabilities. lt is the basic communication system of our enhanced DBMS called PRIMA. In this paper we present different implementations for RCS and an analysis of their pelformance behavior. In...